The project would put more than three million square feet of offices in six towers as high as 38 stories on three blocks bounded by Sixth, Eighth and Westlake Avenues, and Virginia and Blanchard Streets. The plan also includes a meeting center that seats up to 2,000 people, retail, parking, transportation improvements, a playfield, off-leash dog area and garden terraces, with the city vacating the alleys on each of the blocks.

The approval is subject to final changes recommended by the Design Review Board, Amazon funding the operations of a third streetcar and measures to address the impacts of the project, including contributing up to $50,000 per block toward signal timing modifications on Denny Way and a plan to reduce single-occupant car use to no more than 21 percent of all trips to the site during peak commute times.